Compressor or pump



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Z W WICKS COMPRESSOR OR PUMP Filed April. 5, 1925 E w A. mm

, Fein 9 1926.

latented F 9,' 1926i. I .i UNITED. STATES 1,572,632 Parana*--oi=1=lcr..l

ZENO W. WIOKS, OF FORT WORTH, TEXAS, ASSIGNOR TO WORTHINGTON4PUMP ANDv yMACHINERY COINOIR..ATION,l OF NEW YORK, N. Y., A(GORPORATION OFVIRGINIA.

COMPRESSOR OR IEUMIP.

To all whom it may concern.'

Be it known that I, ZnNo W. Wiens, a citizen of the United States,residin at FortiWorth, county of Tarrant, and tate of Texas, haveinvented certain new and useful Improvements in Compressors or Pumps,fully described and represented in the following specification and theaccompanyiug drawings, forming a part of the same.

The present invention relates to improvements in compressors or pumps.

It is the' object of the invention to provide an improved plungerconstruction which will be found especially important as applied toplungers of the higher stage cylinders of air and gas compressors. Bythe use of the present arrangement side pressure on the stuffing boXpacking and stresses tending to cause binding of the plunger head in thecylinder bore, are avoided in case of inisalinement of the plunger,which may be due to wear or other causes, while efficient cooling of theplunger head and the plunger rod throughout its length is secured. rllheimprovement thus provides an arrangement by which straight metallicpacking, as well, of course, as other types of packing, may be used withadvantage in the stuliing box, and by which liquid cooling of thestuffing box and oil supply therein for lubricating the plunger usuallymay be dispensed with, and

thus avoid danger of contaminating the'air l or gas being compressed.

ln the accompanying drawings forming a part of this specificatiomthereis shown in central section and vpartial elevation a compressor cylinderand a plunger and driving connection therefor embodying the invention ina preferred form and this conu struction will now be described in detailin. connection with said drawings, and the novel features of theinvention then be specifically pointed out in the claims.

Referring to the drawings, 11 indicates a compressor cylinder providedwith the usual liner 12, suction and discharge valves 13, 14,respectively, communicating with the cylinder clearance, and a stuffingbox 15. Plunger rod 1 preferably and as shown has formed integrallytherewith a plunger head 2 arranged to work within the liner 12,although it will be understood that the plunger head 2 may be formedseparately from and secured to the rod 1 in any desired manner.According .to the arran' ement shown, the outer end of the rod l 1sconnected to driving'yoke 3, the inner side of the latter being arrangedto abut against afiange 4. formed on such rod, and the end of the rodpassing through the yoke and threaded to receive a nut or nuts 5, two ofthe latter being shown in the present in stance in order to securelocking engagement thereof. Secured to the plunger head 2, as 'bythreaded engagement therewith as shown or otherwise, is a tubular member6, preferably formed of seamless steel and the exterior surface of whichpreferably is highly polished to secure a smooth running fit with thestuffing boxpacking, The member 6 at its outer end is not rigidlyconnected to the rod l, but an annular spaceisprou vided between theseparts at such point, so asl to permit of transverse movement of theplunger rod 1 with respect to the tube 6, as iereafter explained. Theend of the tube 6 is, however, shown as closed by a hood 7 of rubber orlother flexible material, which may be secured in place and in fluidtight engagement with the tube 6 and flange 4i by metal bands underwhich'the hood material is clamped, which are held in place by screws'taking into the flange 4 and tube 6. i

lt will be obvious from the construction so far described that thetubular member 6, on the effective. strokes of the plunger l, will bepulled through the stuffing ox rather than pushed therethrough thussecuring easier functioning of tlieseunning parts, while the provisionfor transverse movement of the outer end of the lunger 1 with ren spectto the tube 6, efliciently provides for selffalinement of the member 6with respect to the cylinder bore should the plunger l, for any reason,be thrown out ofv alinement. Sidepressure on the stuffing box acking bythe lunger rod is therefore avoi ed, so that straight metallic packingmay be used with advantage. Vihilev the self-alining feature above'referred to will efficiently function ,to compensate for inaccuraciesin alinement resulting from wear of the arts or other causes, plungerrod 1 prefere ly will be so proportioned with respect to its len h andthe total load to be carried by the hea 2, that the rod will possess alimited degree of flexibility. `Thus, on slight misalinement thelperipheral running surface on plunger head 2 will remain parallel withthe cylinder bore without being subjectedto any such stresses as mighttend `to cause excessive friction and wear of these parts. With theconstruction so far described, it will be obvious that a chamber 8 ofample size is provided between the plunger rod 1 and the inner wall ofthe tubular member 6. According to the arrangement shown, coolin fluidis maintained in this chamber anV constantly circulated therethrough,such fluid preferably and as shown being admitted thereto by providing aexible pipe a attached to the outer end of the plunger rod 1 andarranged to communicate with a central bore 9 extending the full lengthof such rod andfwell into the head 2 thereon, the cooling fluid enteringthe chamber 8 by way of passages 10. The plunger rod and head are thusfirst cooled by the entering fluid and the maximum effect of suchcooling fluid on the head 2 thus obtained, while the rod 1 and tubularmember 6 are effectively cooled throughout their length. The uidinchamber 8 passes oil through a iiexible tube b leading to any desiredpoint. While the stuing box construction shown includes a lantern ringand passages communicating with the chamber therein thus formed so thatcooling fluid or lubricant may be circulated therein, it will .-'befound that with the present arrangement above described this cooling orlubricating means may be dispensed with in most cases, as eilicientlubrication of the plunger as at present constructed may in .most casesbe secured simply by applying a few drops 'of oil to the plunger-rod ata point outside the stalling box when the plunger rod is at the limit ofits outstroke.

While the invention has been described in connection with a compressorcylinder Aand its plunger and driving connection therefor, it is obviousthat the arrangement herein shown and described is applicable withadvantage to apparatus other than air or gas compressors in whichcooling of the plunger with provision for self-alinement thereof'areimportant, and it will be understood, furthermore, that various changesin the form and arrangement of the parts shown and described may be madewhile still retaining the invention defined by thel claims.

' ble plunger rod within said tubular member arranged tovdrive saidhead, and means for 1,57a,es2

plunger rod and tubular member.

3. A compressor or pump plunger, comprising, in combination, a plungerhead, a tubular member secured to said head, a flexible plun er rodwithin said tubular member arrange to drive said head, a passage in(said plunger rod connecting with the c 1amber between the rod andtubular member,

and means for continuously circulating cooling liuid through the plungerrod and chamber. Y

4. A compressor or pump plunger, comprising, in combination, a plungerhead, a tubular member secured to said head and arranged to have arunning fit with the cylinder bore, a plunger rod within said tubularmember arranged to drive said head, a passage in the plunger hea andcommunicating with thc chamber between the tubular member and saidplunger rod', and means for circulating (ooling fluid through saidpassage and cham- 5. A compressor or pump plunger, com` prising, incombination, a plunger head, a tubular member secured to said head, aplunger rod within said tubular member arranged to drive said head,passages in the plunger rod communicatin with the plunger head and thechamber etween said tubular member and-the lunger rod, and flexibleconnections for clrculating cooling fluid through said passages andchamber.

6. A compressor or pump plunger, comprising, in combination, a plungerhead, a tubular membergsecured to said head and arran ed to have arunning fit` with the cyliner bore, a plunger rod within said tubularmember arranged to drive said head, passages in the plunger rod arrangedto suppl cooling fluid to said head and the cham r between said tubularmember and plunger rod, and flexible connections arranged to delivercooling fluid to the plunger rod passages and carry off the luld fromsaid chamber..

In. testimony whereof, I have hereunto set'my hand.

lznuo w. wIcKs.

plunger rod extending into the.

said

